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    The proportion of individuals likely to benefit from customized optic nerve head structure-function mapping

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    Publication date
    2017
    Author
    McKendrick, A.M.
    Denniss, Jonathan
    Wang, Y.X.
    Jonas, J.B.
    Turpin, A.
    Keyword
    Visual field locations; Optic nerve head; Structure-function mapping; Customized mapping
    Rights
    © 2017 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    yes
    
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    Abstract
    Purpose: Inter-individual variance in optic nerve head (ONH) position, axial length and location of the temporal raphe suggest that customizing mapping between visual field locations and optic nerve head sectors for individuals may be clinically useful. Here we quantify the proportion of the population predicted to have structure-function mappings that markedly deviate from “average”, and thus would benefit from customized mapping. Design: Database study and case report Participants: Population database of 2836 eyes from the Beijing Eye Study; single case report of an individual with primary open angle glaucoma Methods: Using the morphometric fundus data of the Beijing Eye Study on 2836 eyes and applying a recently developed model based on axial length and ONH position relative to the fovea, we determined for each measurement location in the 24-2 Humphrey visual field the proportion of eyes for which, in the customized approach as compared to the generalized approach, the mapped ONH sector was shifted into a different sector. We determined the proportion of eyes for which the mapped ONH location was shifted by 15°, 30° or 60°. Main outcome measures: Mapping correspondence between locations in visual field space to localized sectors on the optic nerve head Results: The largest inter-individual differences in mapping are in the nasal step region where the same visual field location can map to either the superior or inferior ONH depending on other anatomical features. For these visual field locations, approximately 12% of eyes showed a mapping opposite to conventional expectations. Conclusions: Anatomically customised mapping shifts the map markedly in approximately 12% of the general population in the nasal step region where visual field locations can map to the opposite pole of the ONH than conventionally considered. Early glaucomatous damage commonly affects this region, hence individually matching structure to function may prove clinically useful for the diagnosis and monitoring of progression within individuals.
    URI
    http://hdl.handle.net/10454/11080
    Version
    Accepted Manuscript
    Citation
    McKendrick AM, Denniss J, Wang YX, Jonas JB and Turpin A (2017) The proportion of individuals likely to benefit from customized optic nerve head structure-function mapping. Ophthalmology. 124(4): 554-561.
    Link to publisher’s version
    https://doi.org/10.1016/j.ophtha.2016.12.016
    Type
    Article
    Collections
    Life Sciences Publications

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